Description: The module can be used for light detection and brightness detection. It has a power indicator (red) and a relay pull indicator (blue), and has four M3 screw mounting holes, which greatly facilitates the installation. The board can be adjusted by the potentiometer. Sensitivity, self-contained relay, can be used as a variety of brightness detection control switches, such as street lights, etc., automatically turn on at night, automatically turn off during the day, and other equipment that needs automation. Specification: Board parameters 1. The module adopts 12V power supply and has the function of anti-reverse connection. Reverse connection of the power supply will not damage the module; 2. The maximum load capacity of the normally open interface: AC 0V-125V/20A , DC 0V–14V/20A; the output of the module has three common ports ( COM ), normally open ( CK ), normally closed ( CB ), three Each port is equivalent to a dual control switch. When the relay coil is energized, the common terminal and the normally open terminal are connected; when there is no power, the common terminal and the normally closed terminal are connected; the COM terminal is generally connected to the negative pole of the power supply through the load , and the normally open terminal is connected to the positive pole of the power supply Supply voltage: 12VDC Size: 53x31x19mm What you will receive: 1 x 12V Light Control Switch Photoresistor Relay Module Detection Sensor XH-M131